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bootstrap: config loader and executable for cadence server (cadence-w…
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,174 @@ | ||
| // Copyright (c) 2017 Uber Technologies, Inc. | ||
| // | ||
| // Permission is hereby granted, free of charge, to any person obtaining a copy | ||
| // of this software and associated documentation files (the "Software"), to deal | ||
| // in the Software without restriction, including without limitation the rights | ||
| // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | ||
| // copies of the Software, and to permit persons to whom the Software is | ||
| // furnished to do so, subject to the following conditions: | ||
| // | ||
| // The above copyright notice and this permission notice shall be included in | ||
| // all copies or substantial portions of the Software. | ||
| // | ||
| // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | ||
| // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | ||
| // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | ||
| // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | ||
| // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | ||
| // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | ||
| // THE SOFTWARE. | ||
|
|
||
| package main | ||
|
|
||
| import ( | ||
| "github.com/uber/cadence/common/service/config" | ||
| "github.com/urfave/cli" | ||
| "log" | ||
| "os" | ||
| "strings" | ||
| ) | ||
|
|
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| // validServices is the list of all valid cadence services | ||
| var validServices = []string{historyService, matchingService, frontendService} | ||
|
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| // main entry point for the cadence server | ||
| func main() { | ||
| app := buildCLI() | ||
| app.Run(os.Args) | ||
| } | ||
|
|
||
| // startHandler is the handler for the cli start command | ||
| func startHandler(c *cli.Context) { | ||
| env := getEnvironment(c) | ||
| zone := getZone(c) | ||
| configDir := getConfigDir(c) | ||
|
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| log.Printf("Loading config; env=%v,zone=%v,configDir=%v\n", env, zone, configDir) | ||
|
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| var cfg config.Config | ||
| config.Load(env, configDir, zone, &cfg) | ||
| log.Printf("config=\n%v\n", cfg.String()) | ||
|
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| for _, svc := range getServices(c) { | ||
| if _, ok := cfg.Services[svc]; !ok { | ||
| log.Fatalf("`%v` service missing config", svc) | ||
| } | ||
| server := newServer(svc, &cfg) | ||
| server.Start() | ||
| } | ||
|
|
||
| select {} | ||
| } | ||
|
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| func getEnvironment(c *cli.Context) string { | ||
| return strings.TrimSpace(c.GlobalString("env")) | ||
| } | ||
|
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| func getZone(c *cli.Context) string { | ||
| return strings.TrimSpace(c.GlobalString("zone")) | ||
| } | ||
|
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| // getServices parses the services arg from cli | ||
| // and returns a list of services to start | ||
| func getServices(c *cli.Context) []string { | ||
|
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| val := strings.TrimSpace(c.String("services")) | ||
| tokens := strings.Split(val, ",") | ||
|
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| if len(tokens) == 0 { | ||
| log.Fatal("list of services is empty") | ||
| } | ||
|
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| for _, t := range tokens { | ||
| if !isValidService(t) { | ||
| log.Fatalf("invalid service `%v` in service list [%v]", t, val) | ||
| } | ||
| } | ||
|
|
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| return tokens | ||
| } | ||
|
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| func isValidService(in string) bool { | ||
| for _, s := range validServices { | ||
| if s == in { | ||
| return true | ||
| } | ||
| } | ||
| return false | ||
| } | ||
|
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| func getConfigDir(c *cli.Context) string { | ||
| return path(getRootDir(c), c.GlobalString("config")) | ||
| } | ||
|
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| func getRootDir(c *cli.Context) string { | ||
| dirpath := c.GlobalString("root") | ||
| if len(dirpath) == 0 { | ||
| cwd, err := os.Getwd() | ||
| if err != nil { | ||
| log.Fatalf("os.Getwd() failed, err=%v", err) | ||
| } | ||
| return cwd | ||
| } | ||
| return dirpath | ||
| } | ||
|
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| func path(dir string, file string) string { | ||
| return dir + "/" + file | ||
| } | ||
|
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| func buildCLI() *cli.App { | ||
|
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| app := cli.NewApp() | ||
| app.Name = "cadence" | ||
| app.Usage = "Cadence server" | ||
| app.Version = "0.0.1" | ||
|
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| app.Flags = []cli.Flag{ | ||
| cli.StringFlag{ | ||
| Name: "root, r", | ||
| Value: ".", | ||
| Usage: "root directory of execution environment", | ||
| EnvVar: config.EnvKeyRoot, | ||
| }, | ||
| cli.StringFlag{ | ||
| Name: "config, c", | ||
| Value: "config", | ||
| Usage: "config dir path relative to root", | ||
| EnvVar: config.EnvKeyConfigDir, | ||
| }, | ||
| cli.StringFlag{ | ||
| Name: "env, e", | ||
| Value: "development", | ||
| Usage: "runtime environment", | ||
| EnvVar: config.EnvKeyEnvironment, | ||
| }, | ||
| cli.StringFlag{ | ||
| Name: "zone, az", | ||
| Value: "", | ||
| Usage: "availability zone", | ||
| EnvVar: config.EnvKeyAvailabilityZone, | ||
| }, | ||
| } | ||
|
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| app.Commands = []cli.Command{ | ||
| { | ||
| Name: "start", | ||
| Aliases: []string{""}, | ||
| Usage: "start cadence server", | ||
| Flags: []cli.Flag{ | ||
| cli.StringFlag{ | ||
| Name: "services, s", | ||
| Value: strings.Join(validServices, ","), | ||
| Usage: "list of services to start", | ||
| }, | ||
| }, | ||
| Action: func(c *cli.Context) { | ||
| startHandler(c) | ||
| }, | ||
| }, | ||
| } | ||
|
|
||
| return app | ||
|
|
||
| } |
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